Zero field cooled exchange bias effect in nano-crystalline Mg-ferrite thin film

Himadri Roy Dakua

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The Zero Field Cooled (ZFC) Exchange Bias (EB) effect in a single phase nanocrystalline Mg-ferrite thin film, deposited on an amorphous quartz substrate using pulsed laser ablation technique, is reported. The film showed a high ZFC EB shift (HE ∼190 Oe) at 5 K. The ZFC EB shift decreased with increasing temperature and disappeared at higher temperatures (T > 70 K). This Mg-ferrite thin film also showed the Conventional Exchange Bias (CEB) effect, but unlike many CEB systems, the film showed a decrease in coercivity (HC) under the Field Cooled measurements. The film also showed the training effect in ZFC measurements, which followed the frozen spin relaxation behavior. The observed exchange bias could be attributed to the pinning effect of the surface spins of frozen glassy states at the interface of large ferrimagnetic grains.

Original languageEnglish
Article number035324
JournalAIP Advances
Volume10
Issue number3
DOIs
StatePublished - 1 Mar 2020
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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